Reversing mechanism.



J. PETRELLI.

' RBVERSING MECHANISM.

APPLICATION FILED 5113.18, 190.9.

Patented Oct. 19, 1909.

2 SHEETS-SHEET 1.

J. PETRBLLI.

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APPLIOATION FILED JAN. 18, 1909. I

Patented Oct. 19, 1909.

2 SHEETS-SHEET 2.

nnirnn STATES PATENT canton JOSEPH PETRELLI, OF NEW HAVEN, CONNECTICUT,ASSIGNOE TO THE SNOW & PETRELLI MFG. CO., OF NEW HAVEN, CONN ECTICUT,ACORPORATION.

ianvnnsrne MECHANISM.

. Specification of Letters Patent. Patented Oct. 19, 19(99.

Application filed January 18, 1909. Serial No. 472,890.

To all whom it may concern:

Be it known that I, J osEPHfPnrRELLI, a citizen of the 'United States,residing at New Haven, in the county of New Haven and State ofConnecticut, have invented a new and useful Improvement in ReversingMechanisms; and I do hereby declare the following, when taken inconnection with. the accompanying drawings and the characters ofreference marked thereon, to be a full, clear, and exact description ofthe same, and which said drawings constitute part of this specification,and represent, in

Figure 1 a view in vertical longitudinal section of a reversingmechanism constructed in accordance with my invention. Fig. 2 a detailview in side elevation showing the bearing head, the two driving gearscarried thereby, the driven sleeve, and the driven gear fixed thereto,one of the driving gears being removed from its stud. Fig. 3 a detachedview in side elevation. of the gearcase cover. Fig. 4 a view in sideelevation of the friction disk. Fig. 5 a view in front elevation of myimproved mechanism, with the gear-case removed. Fig. 6 a view inelevation of the gear-case looking into it or toward the engine, showingalso the thrustfiange of the power-transmitting sleeve, the eccentriccarried by the said flange and the bearing-stud of the said sleeve. Fig.7 a detached view in side elevation of the gearcase. Fig. 8 a brokenplan view of the friction-band. Fig. 9 a detached face-view of thefriction-disk. Fig. 10 a detached view of the eccentric or ring.

My invention relates to an improved reversing mechanism for use inconnection with the gasolene engines of power boats, automobiles, &c.,the object being to produce a convenient, reliable and efi'ective deviceconstructed with particular reference to compactness of form, fewness ofgears, and to smoothness and quietness of operation.

With these ends in view my inventionconsists in a reversing mechanismhaving certain details of construction and combinations of parts as willbe hereinafter described and pointed out in the claims.

In carrying out my invention as herein shown, I employ a sleeve 2adapted to receive a power-transmitting shaft 2 which may be a part ofthe engine or any other source of power. The said sleeve 2 runs in abushing 3 located in a hub 4 forming a part of a gear-case 5 which isformed upon its interior with a concentric recess 6 for the reception ofa thrust-flange 7 located upon the inner end of the sleeve 2 and bearingupon a thrust-ring 8 located in the bottom of the said recess 6. Thesaid sleeve 2 is furnished at its extreme inner end with a concentricbearing and centering stud 9 entering a socket 10 in the inner end of adriven sleeve 11 the outer end of which is formed with a correspondingsocket 12 for the reception of the driven shaft 13 which is secured tothe sleeve 11 by means of a set screw 14.

The thrust-fiange 7 is provided upon its inner face with an eccentric 15encircled by an eccentric strap or ring 16 formed at its opposite endswith ears 1?, having perforations 18, respectively receiving crankpins19, carried by the flanges 20 of two driving gears 21 respectivelyturning freely upon studs 22, mounted in a disk-like bearing head 23which is applied to the open rear end of the gear'case 5 for which itforms the real closure. The said head 23 is provided in its edge withscrew-holes 24 receiving long screws 25 employed to fasten the cover 26to the gear-case, the bearing head 23 being interposed between the openrear end of'the gear case and the inner face of the cover 26. Thedriving gears 21 mesh into a driven gear 27 mounted upon the forward endof the sleeve 11 aforesaid which has bearing in the bearing-head23.

Between the bearing head 23 and the cover 26, I interpose afriction-disk 28 the forward face of which bears upon a raised frictionface 29 formed upon the outer face of the head 23, the said disk beingfree to slide upon the sleeve but held against rotation thereupon bymeans of a key 28 The outer face of the said disk 28 is engaged by theinner faces of the flanged forward ends of three plungers 30 mounted inthe cover 26 and engaged at their outer ends by the camlike forward endsof clutch-fingers 31 turning upon pivots 32 mounted in the radial earsof a ring 33 encircling the hub 34 of the cover 26. The said ring 33 isheld against rotation by its provision with a notch 35 receiving a pinor feather 36 projecting from the cover 26, and held in place upon thehub 34 by means of a threaded collar 37 provided with set screws 38engaged with the hub 34. The adjustment of tive; The said fingers 31coact with a cone 39 loosely mounted on the driven shaft 13 on which itis free to revolve and to move longitudinally, the cone being mounted inthe usual manner in an operating-handle 40 having its lower endconnected by a pin 41 With the rear end of a fulcrum link 42 connectedat its forward end to a friction band 43 which has two depending ears44-44 receiving a pin 45 passing through the said forward end of thelink 42, the said band forming a fulcrum for the operation of the handle40. The said brake-band 43 encircles the rear portion of the gear-case5, the head 23 and theforward portion of the cover 26,and is providedfor its own operation With two upstanding lugs 46 and 47 located at itsrespective ends. These lugs afford a bearing for a rock-shaft 48 formedat one end with screw threads taking into corresponding threads in thelug 46 while its opposite end projects through the lug 47 and is formedwith a flange or hub 49 carrying near its edge a screw. 50 held in placeby a jam nut 51 and having its inner end rounded for co-action with acam-surface 52 formed upon the outer face of the hub 47. The said rockshaft 48 has secured to it the lower end of a short lever 53 the upperend of which is connected by a pin 54 with the forward end of a link 55the rear end of which is attached by a pin 56 to the operating handle40.

Having now described the detailed construction of my improved reversingmechanism, I will set forth the mode of operating it. Supposing theengine, or other source of power, to be running and the operating-handle40 to be in its intermediate position, there will be no transmission ofpower from the power-transmitting sleeve 2 to the propeller shaft 13,for the reason that the friction-disk 28 is not applied. Under theseconditions the driving gears 21 will run idle at the speed of the sleeve2 and power-shaft 2, and the driven gear will remain at rest. If now thehandle 40 be pushed forward, the finger-cone 39 will immediately operateto spread the clutchfingers 31 apart, whereby the cam-like forward endsthereof will operate to push the 'p'lu'ngers 30 forward and hence forcethe friction-disk 28 forward against the friction face 29 of the bearinghead 23, whereby the propeller shaft 13 and the power-transmittingsleeve 2 will be locked together for the reason that the friction-disk28 is now frictionally held by the bearing-head 23 in addition to beingkeyed to the driven sleeve 11. On account of this frictional engagementbetween the bearing-head 23 and the friction-disk 28 they can no longerrun idle as before, but must now turn together on a common axis. In thisconnection I may say that when the gears are running idle, as beforeexplained, the power-shaft 2 and driven shaft 13 are free to be turnedindependently of each other, there being no driving connection betweenthem. During this time the gear case 5 is free to turn inside of thebrake-band 43. hen the handle 40 is pulled rearward, the finger-cone 39is withdrawn from the clutch-fingers 31, thereby relieving the plungers30 which in turn relieve the friction disk 28 which moves rearward andbreaks its frictional engagement with the friction-head 23. Thecontinued rearward movement of the handle 40 acts through the link 55and short lever 53 to rock the screwshaft 48, whereby the screw 50 isforced to ride up the steep portion of the camsurface 52, with theresult of drawing the lugs 46 and 47 together so as to clamp the band 43upon the gear-case 5. This is what might be called the quick movement ofthe band. the final grip of the band upon the case being effected by thethreading of the shaft 48 into the lug 46. f.

The gear-case 5 being thus held against rotation by the band 43, thepower-transmitting sleeve 2 turns within it and causes the eccentric 15to turn within the eccentric ring 16 and thus set up, so to speak, thereciprocal or crank-like motion of the eccentric ring 16 which istransmitted through the crank-pins 19 to the driving-gears 21 which arerotated and in turn rotate the driven gear 27 fixed upon the forward endof the driven sleeve 11 to which the driven shaft 13 is secured. I mayadd that there is no revolution of the ring 16 as a ring, although itbodily describes a circular path around the longitudinal axis of theentire mechanism. In other words, the eccentric ring without itselfrotating, travels in the circular path required for the rotation of thedriving gears 21 by the crank-pins 19. Under these circumstances thedriven shaft 13 will rotate in the opposite direction from thepower-transmitting sleeve 2 at a speed determined by the relative sizesof the driving and driven gears. As shown in the drawings, the teeth inthe driving gears 21 and the driven gear 27 are as 2 to 3. But of coursethis proportion may be varied as found expedient. \Vhen the handle 40 ispushed forward into its intermediate position again, the link 55 willact through the short-lever 53 to rock the shaft 48 in the oppositedirection, whereby the riding of the screw 50 down the steep pitch ofthe camsurface will effect the quick release of the band 43 from thegear case 5. From this time the mechanism will again run idle as alreadyexplained. It will be observed that no power is transmitted by the gearswhich only operate when the device is running idle.

I claim 1. In a reversing I'DGClltll'llSlTl, the combination with apower-transmitting member, of a gear-case loosely mounted upon the saidpower-transmitting member for rotation thereon, driving gears,crank-connection between the power-transmitting member and the saidgears, whereby the same are rotated, a driven gear meshed into bythedriving gears, means for carrying the driving gears and means forholding the gear-case against rotation.

2. In a reversing mechanism, the combination with a power-transmittingmember, of an eccentric carried thereby, a ring for the eccentric,driving gears connected with the eccentric ring for rotation thereby, adriven gear meshed into and driven by the driving gears, and a drivenmember carrying the driven gear and rotated thereby and means forholding the gear-case against rotation.

3. In a reversing mechanism, the combination with a power-transmittingmember, of

a gear-case mounted thereupon, an eccentric carried by the said member,an eccentric ring operated by the eccentric, driving gears connectedwith and rotated by the said ring, a driven gear rotated by the drivinggears, a driven member rotated by the said driven gear, a bearing headcarrying the driving gears, forming a bearing for the driven mem- 1 herand secured to the gear-case, and friction mechanism for frictionallycouphng the bearing-head and driven member.

4. In a reversing mechanism, the combination with a power-transmittingmember, of I a gear-case mounted thereon, an eccentric carried by thesaid member, an eccentric ring operated by the eccentric, driving gearsrotated by the said ring, a driven gear rotated by the driving gears, adriven member rotated by the driven gear, a bearing-head carrying thedriving gears, and secured to the gear case, a friction-disk connectedto the said driven member, plungers for forcing the said disk intofrictional engagement with the bearing-head, a handle, and means fortransmitting the movement of the handle to the plungers, whereby thefriction-disk is frictionally coupled to the bearing-head, and thedriven member locked to the power-transinitting member.

5; In a reversing mechanism, the combination with a gear-case, of apower-transmitting member mounted thereupon, driving gears, acrank-connection between the said member and gears, whereby the latterare rotated, a driven gear meshed into by the driving gears, adriven-member carrying the driven gear, a bearing head secured to thegear case and carrying the driving gears, a cover secured to the gearcase, a friction disk interposed between the said cover and bearinghead, means for operating the said friction-disk, and a friction bandfor holding the gear case against rotation.

6. In a reversing mechanism, the combination with a power-transmittingmember, of a gearcase mounted thereupon, driving gears, crank-connectionbetween the said member and gears, a driven gear meshed into by thedriving gears, a driven member driven by the said driven gear, a bearinghead secured to the gear case and carrying the driven ears, a coversecured to the gearcase, a friction disk interposed between the bearinghead and cover and slidably but non-rotatably mounted upon the saiddriven member, means for operating the said friction disk, whereby it isfrictionally engaged with the bearing-head, and means for holding thegear case against rotation.

In testimony whereof, I have signed this specification in the presenceof two subscribmg witnesses.

JOSEPH PETRELLI. Witnesses:

CLARA L. WEED, GEORGE D. SEYMOUR.

